UPS Specifications
40 Liebert
®
NX
™
6.4.3 Inverter Output
6.4.4 Bypass Input
Table 13 Inverter output
Rated Power kVA
40 60 80 100 120 160 200
Rated voltage, VAC 480
Supply 3-phase, 3-wire plus ground
Frequency, Hz 60 (50Hz in frequency converter mode)
Rated Power, kW 36 54 72 90 108 144 180
Three-phase transient
overload, min. load
105% to 110% for 60 minutes
111% to 125% for 10 minutes
126% to 150% for 1 minute
Voltage Regulation%
±1% 3-phase RMS average for a balanced three-phase load for the combined variation
effects of input voltage, connected load, battery voltage, ambient temperature and load
power factor
±2% 3-phase RMS average for a 100% unbalanced load for the combined variation
effects of input voltage, connected load, battery voltage, ambient temperature and load
power factor
Frequency Regulation%
Nominal frequency regulation is ±0.05% in single module mode,
and+/- 0.25% in parallel mode.
Maximum rate of change
of frequency, Hz/sec
Selectable from 0.1Hz/sec to 3.0Hz/sec maximum for single unit
Fixed maximum of 0.2Hz/sec for paralleled units
See Table 8 for current ratings.
Table 14 Bypass input
Rated Power, kVA 40 60 80 100 120 160 200
Rated voltage, VAC 480
Supply 3-phase, 3-wire plus ground
Bypass voltage tolerance%
Upper limit: +10%, +15% or +20%; Upper limit default: +15%
Lower limit: -10%, -20%, -30% or -40%; Lower limit default: -20%
Frequency, Hz 60
Input frequency tolerance% ±2.5%, ±5%, ±10% and ±20%; default ±10%
Bypass overload
capacity (all ratings)
Rated Output Current: Duration of Overload
105% to 110%: 60 Minutes
111% to 125%: 10 Minutes
126% to 150%: 1 Minute
1000%: 100 Milliseconds
See Table 8 for current ratings.
Bypass frequency synchronization range setting should be wider than bypass frequency shift range.
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